High Altitude Adjustments

Article No:
82-17-21

08/26/82

High Altitude Adjustments

Light Trucks
1983 Ranger
Calibrations: 3-49S/3-50S

Warning:
This Modification Is Authorized Only For The Listed Engines. Performing This Modification On Other Engine Calibrations Is Unauthorized And Could Create Laibility Under Applicable Federal Or Local Laws.

Customers who may have relocated and/or continually operate the subject vehicles in high altitudes (above 4000 ft. alt.) may have the following procedures performed to improve performance or service carburetor loading:


1. Calibration 3-49S (2.3L Manual Transmission)

a. Change initial timing from 6 to 10° BTDC.

b. Remove PCV valve (yellow) by removing the purge hose and upper crankcase vent hose.

c. Insert new PCV valve (D8EE-6A666-AA green) into crankcase vent hose (lower).

d. Reconnect the upper crankcase vent hose.

e. Cut and install a new 7/32 rubber hose from the purge valve to the "F" fitting on the PCV valve assembly.

2. Calibration 3-50S (2.3L Automatic Transmission)

a. Change initial timing from 8 to 12°BTDC.

b. Change PCV valve assembly as outlined above 1-b through 1-e.








Obtain a Vehicle Emission Control Information Update Label (available at all Ford or Lincoln-Mercury dealers) and fill in the appropriate information. In the top paragraph of the label, cross off the altitude (HIGH or LOW) that does not apply and enter the number of the Technical Service Bulletin and Article number that provided the modification instructions. Write in the remarks as illustrated in the appropriate Article, including the new specifications where a space has been provided and the actual numbers have been left blank. At the bottom of the label, enter the date the modification was performed. Select a prominent place adjacent to the Vehicle Emission Control Information decal suitable for installing the label. Do not install the label on any component that can be easily detached from the vehicle. Clean the area, install the label and cover it with a clear plastic decal shield.

NOTE:
The Vehicle Emission Control Information Update Label is a new label to be used for altitude modifications. Do Not use the Authorized Modifications Label which is used to indicate other types of modifications.

OTHER APPLICABLE ARTICLES: None





PARTS BLOCK

WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.

OPERATION: SP 6666-B-82
TIME: 0.4 Hr.

DLR. CODING: Basic Part No. DRIVE Code: 53